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Department of Water and Environmental Regulation HYMONTH V128 Output 16/08/2026
Site 616234 Bayswater Main Drain - Bassendean Road Site 616234
VarFrom 10.00 Stage - SL in Metres
VarTo 140.00 Mean Stream Discharge in Cubic Metres/Second
Figures are for period ending 24:00
Mean Median Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Monthly Monthly Days Yr
2023 [0.054] 0.051$ 0.055$ 0.062$ 0.053$ 0.275& 0.236# 0.225# 0.189# 0.106# 0.073# 0.062# [0.120] [0.067] 25 2023
2024 0.058# 0.046$ 0.044& 0.035& 0.045$ 0.155$ 0.194# 0.323$ 0.249# [0.255] [0.134] 0.096& [0.136] [0.115] 41 2024
2025 0.061& 0.042& 0.047$ 0.041$ 0.050$ 0.138$ 0.227$ 0.424$ 0.406$ 0.297$ 0.159$ 0.126$ 0.168& 0.132& 0 2025
2026 0.084$ 0.057$ 0.083$ 0.084$ 0.089$ 0.179$ 0.222$ [0.292] [ ] [ ] [ ] [ ] [0.136] [0.086] 139 2026
205 Total
Mean [0.064] 0.049& 0.057& 0.055& 0.059$ 0.187& 0.220$ [0.316] 0.281$ [0.220] [0.122] 0.095& [0.140] Mean
Med. [0.059] 0.049& 0.051& 0.051& 0.051$ 0.167& 0.225$ [0.307] 0.249$ [0.255] [0.134] 0.096& [0.092] Med.
Max [0.084] 0.057& 0.083& 0.084& 0.089$ 0.275& 0.236$ [0.424] 0.406$ [0.297] [0.159] 0.126& [0.168] Max
Min [0.054] 0.042& 0.044& 0.035& 0.045$ 0.138& 0.194$ [0.225] 0.189$ [0.106] [0.073] 0.062& [0.120] Min
OK 80% 100% 100% 100% 100% 100% 100% 86% 100% 77% 78% 100% 94% OK
Cnt 4 4 4 4 4 4 4 4 3 3 3 3 4 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available
Department of Water and Environmental Regulation HYMONTH V128 Output 16/08/2026
Site 616234 Bayswater Main Drain - Bassendean Road Site 616234
VarFrom 10.00 Stage - SL in Metres
VarTo 140.00 Maximum Stream Discharge in Cubic Metres/Second
Figures are for period ending 24:00
Annual Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Max Days Yr
2023 [0.086] 0.102$ 2.240$ 0.258$ 0.430$ 5.302& 1.154# 1.137# 1.052# 0.240# 0.132# 0.098# [5.302] 25 2023
2024 0.074# 0.074$ 0.093& 0.161& 0.495$ 3.401$ 1.359# 1.940$ 0.842# [0.966] [0.199] 0.232& [3.401] 41 2024
2025 0.191& 0.226& 0.495$ 0.188$ 0.481$ 1.108$ 1.367$ 1.325$ 1.277$ 1.025$ 0.514$ 1.635$ 1.635& 0 2025
2026 0.135$ 0.258$ 1.033$ 0.218$ 1.025$ 0.815$ 1.186$ [1.299] [ ] [ ] [ ] [ ] [1.299] 139 2026
205 Total
Mean [0.121] 0.165& 0.965& 0.206& 0.608$ 2.657& 1.267$ [1.425] 1.057$ [0.744] [0.282] 0.655& [2.909] Mean
Med. [0.110] 0.164& 0.764& 0.203& 0.488$ 2.255& 1.273$ [1.312] 1.052$ [0.966] [0.199] 0.232& Med.
Max [0.191] 0.258& 2.240& 0.258& 1.025$ 5.302& 1.367$ [1.940] 1.277$ [1.025] [0.514] 1.635& [5.302] Max
Min [0.074] 0.074& 0.093& 0.161& 0.430$ 0.815& 1.154$ [1.137] 0.842$ [0.240] [0.132] 0.098& [1.299] Min
OK 80% 100% 100% 100% 100% 100% 100% 86% 100% 77% 78% 100% 94% OK
Cnt 4 4 4 4 4 4 4 4 3 3 3 3 4 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available
Department of Water and Environmental Regulation HYMONTH V128 Output 16/08/2026
Site 616234 Bayswater Main Drain - Bassendean Road Site 616234
VarFrom 10.00 Stage - SL in Metres
VarTo 140.00 Minimum Stream Discharge in Cubic Metres/Second
Figures are for period ending 24:00
Annual Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Min Days Yr
2023 [0.049] 0.038$ 0.027$ 0.046$ 0.039$ 0.046& 0.126# 0.141# 0.116# 0.072# 0.056# 0.050# [0.027] 25 2023
2024 0.049# 0.037$ 0.036& 0.027& 0.021$ 0.052$ 0.072# 0.168$ 0.178# [0.181] [0.113] 0.071& [0.021] 41 2024
2025 0.008& 0.028& 0.034$ 0.027$ 0.030$ 0.052$ 0.085$ 0.186$ 0.270$ 0.191$ 0.103$ 0.086$ 0.008& 0 2025
2026 0.060$ 0.039$ 0.041$ 0.057$ 0.064$ 0.102$ 0.161$ [0.176] [ ] [ ] [ ] [ ] [0.039] 139 2026
205 Total
Mean [0.041] 0.036& 0.034& 0.039& 0.039$ 0.063& 0.111$ [0.168] 0.188$ [0.148] [0.091] 0.069& [0.024] Mean
Med. [0.049] 0.037& 0.035& 0.036& 0.035$ 0.052& 0.105$ [0.172] 0.178$ [0.181] [0.103] 0.071& Med.
Max [0.060] 0.039& 0.041& 0.057& 0.064$ 0.102& 0.161$ [0.186] 0.270$ [0.191] [0.113] 0.086& [0.039] Max
Min [0.008] 0.028& 0.027& 0.027& 0.021$ 0.046& 0.072$ [0.141] 0.116$ [0.072] [0.056] 0.050& [0.008] Min
OK 80% 100% 100% 100% 100% 100% 100% 86% 100% 77% 78% 100% 94% OK
Cnt 4 4 4 4 4 4 4 4 3 3 3 3 4 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available